Vito v6 om642 white smoke

[vitox]

Hi everyone.
I have done some work on my vito v6 with engine om642(DPF) and now i have excessive smoke.(before work was normal, no smoke, this way i excluding injector/s fail, also egr cooler as coolant stay same level, clean )
work done:
- oil cooler seals
- swirl flaps removed(they was stuck in open position with resistor mod before job )
- all seals changed during the work, fuel, air filter changed.
- injectors seals done
- new return pipe fitted as old one badly leaked on 2 injectors i had diesel leak, inside injector chamber was full of diesel?!!? i have noticed after long journey oil too high warning on dashboard
- new pcv valve +breather changed
after all this work i have decided to change oil so i added flush and run engine for about 10min , was no smoke yet at all at this moment
so maybe from here i have made a mistake next
-changed oil +filter ,Fuchs Titan GT1 5w40 never used this before but is MB-APPROVAL 229.51
- playing in Xentry i have pressed dpf regeneration and regen starts, for couple of seconds and then i canceled it as clouds of smoke starts coming out, i understand now this can be 99% of the problem, regen started and now it trying to finish every time i start the car.

is it a way to stop regeneration without complete it?i can't do 20min of smoke in my area (maybe ECU reset?) or any other methods? or here can be different problem? thank you in advance for any help

pictures added , when engine is hot , iddling no smoke, just put gear in drive or reverse thes egr values changing and lots of smoke start comming out.

 

[vitox]

Update , I have done forced dpf regeneration with xentry, all gone successfully ,first 2minutes a lot of smoke but then clear till the end of regeneration about 20minutes, temperature raised around 630 degrees . Smoke disappeared. Took van for a drive test drove about 15minutes coolant temperature raised around 70degrees and no smoke, BUT.. when accelerating and I heard selector gone from 3rd to 4th speed also a sound of turbo or boost wining then gone in limp mode, drove back on drive checked for codes and found 2089-008 b18 component code, exhaust back pressure sensor, does not function properly , plausible error

 

[vitox]

Changed exhaust back pressure sensor with brand new genuine one, code is not coming up anymore even after hard acceleration, but sometimes still i can hear turbo whine/whistle after 3000rpm, just a interval from 3000 to 4000rpm.(maybe a boost leak somewhere).
How to check MAF sensor on this engine? if unplug it when engine running it will stop engine? as mine when i disconnect it just changing engine noise a bit but not stops

 

[vitox]

ok, so now i am stressed as code come back but is not going in limp mode anymore
code 2641-008 , back exhaust sensor changed already also i have changed MAF sensor (to make sure), please someone give some hints as i am nearly ready to give up

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[vitox]

still no progress , i am thinking why exhaust back pressure drops quick at around 2000 rpm, its turbo activating or egr kicks in

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[vitox]

suspecting catalityc converter blocked i undo cat from dpf , pressure dint changed, and then i undo bolts between turbo and cat and back exhaust pressure gone down as it should

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but i have checked with inspecting camera catalytic looks clean inside(i think), i bought some cataclean to give it a go

 

[Gnasher141]

suspecting catalityc converter blocked i undo cat from dpf , pressure dint changed, and then i undo bolts between turbo and cat and back exhaust pressure gone down as it should

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but i have checked with inspecting camera catalytic looks clean inside(i think), i bought some cataclean to give it a go

I sorry I can’t help you mate. I feel for you.
You not getting much help from this lot are you!

 

[vitox]

I sorry I can’t help you mate. I feel for you.
You not getting much help from this lot are you!

thank you for understanding , now is more that a principle to have it done as i gone too far spending my time and money.

So far i suspected catalytic but i still think its not this the problem, as flow are very good from exhaust at idle i feel it around 1.5metre, also i have done another forced regeneration with cataclean in fuel and DPF/Catalytic cleaner foam inserted in catalytic, through temperature sensor slot, in the same time.(oil changed after)
Checked back pressure after and no changes at all, it was around 1500mpa and the same after regeneration, but... playing more i have noticed EGR closing and opening randomly and at this time back pressure jumping up to 1600mpa and sometimes going down to 1400mpa, so now i dropped catalytic plugged theory.

so here is the questing what another sensor in the system can cause back pressure stay high? maybe back pressure sensor bad even new as is very sensitive and instead showing 1000mpa it shows 1500mpa? (i have ordered another sensor to check this , one cheaper chinese)

 

[vitox]

today trying to disconnect sensors one by one live i have noticed disconnecting MAP and MAF sensors back pressure gone down, ordered MAP sensor today i have noticed readings before it gives out of range pressure

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and data from xentry with these sensors disconnected revs up to r000rpm

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[Gnasher141]

I think if it was me I would get a proper diagnosis from a good independent garage/specialist before throwing too much money at individual component's. Good luck

 

[vitox]

I think if it was me I would get a proper diagnosis from a good independent garage/specialist before throwing too much money at individual component's. Good luck

that will be to easy to give up))

Sorted, job done.

Conclusion : wrong back pressure sensor, first one i bought expensive one ''Original'' made in Germany from ebay for 68pounds , it showed about 400hpa more that is should be, i think is that one absolute or relative sensor https://static.nhtsa.gov/odi/tsbs/2017/MC-10158249-9999.pdf but it has the same part number A0051535028.
I just bought another the cheapest i found on ebay for 11pounds and it worked , it also had a merc logo on it made in china, now i have proper back pressure , just a bit out of range on boost pressure sensor but the cheapest from ebay also coming in a day(also 11 pounds), but i am glad now all sorted , engine sound nice, smooth.
Hope this info will be helpful for someone.

 

[Gnasher141]

Well done!!
Glad you got it sorted